Data collection from office-js

Hi,

I've noticed that when I include the script for the office integration a POST request is sent to the following address https://browser.pipe.aria.microsoft.com/Collector/3.0/?qsp=true&content-type=application/bond-compact-binary&client-id=NO_AUTH&sdk-version=AWT-Web-JS-1.1.1&x-apikey=db334b301e7b474db5e0f02f07c51a47-a1b5bc36-1bbe-482f-a64a-c2d9cb606706-7439&client-time-epoch-millis=1518000010111&time-delta-to-apply-millis=use-collector-delta

This happens for both the debug version (https://appsforoffice.microsoft.com/lib/1.1/hosted/office.debug.js) and the production version (
https://unpkg.com/@microsoft/office-js/dist/office.js)

This request appears to be collecting a fair amount of data.

1. Can you please be transparent about what data you're collecting and why you're collecting it.
2. Is this data collection 'feature' documented any where?
3. Can I turn this 'feature' off?
4. What impact, if any, does this have on my users when GDPR compliance comes into force in May?

Thank you.